Multiquip 2190 Screw Hex Head Flange Serrated 5/16-18 x 1-1/2 GRD 5

The Multiquip 2190 is a genuine OEM Screw Hex Head Flange Serrated 5/16-18 x 1-1/2 GRD 5 designed for a wide range of Multiquip and Whiteman equipment including Water Trailer models, walk-behind power trowels, ride-on power trowels, and towable light towers. As a factory-sourced fastener, part 2190 meets the exact thread pitch, grade, and dimensional requirements specified for these machines. Compatible models include the Water Trailer series, J36, B46, BS90C, BH11C, BH90C, JS60C, JH90C, JH55C, HHXD5, HTXD6i, STXD6i, HTN28K, HTN27K, LT6K, and more. Ordering the correct OEM fastener eliminates the guesswork of sourcing generic hardware that may not match the required grade or flange geometry.

Key Features

• Grade 5 Tensile Strength — Manufactured to GRD 5 specification, delivering the clamping force and shear resistance required for structural and mechanical fastening points on Multiquip equipment.
• Serrated Flange Bearing Surface — The integrated serrated flange bites into the mating surface to resist loosening under vibration — critical on trowels and compaction equipment that generate continuous cyclic loads.
• Correct Thread Form: 5/16-18 UNC — Unified coarse thread matches the tapped holes and mating hardware as specified by Multiquip, ensuring full thread engagement without cross-threading risk.
• Broad Cross-Equipment Fitment — A single genuine OEM part number covers Water Trailer, walk-behind trowel, ride-on trowel, and light tower applications including the Water Trailer series, B46, J36, HHXD5, HTXD6i, STXD6i, and LT6K series.
• Genuine OEM Sourcing — Part 2190 is sourced directly from Multiquip, confirming correct material grade, plating, and dimensional tolerances — not a generic hardware substitute.

A hex head flange screw combines the function of a standard hex bolt with an integrated washer-style flange beneath the head. The serrations machined into that flange grip the mating surface as the fastener is tightened, creating mechanical resistance to vibration-induced loosening without requiring a separate lock washer. On equipment like power trowels and water trailers — where engine vibration, rotating assemblies, and road travel continuously stress fastened joints — maintaining proper clamp load at each fastener point is essential to keeping panels, guards, and structural components securely in place. A fastener of the wrong grade, thread pitch, or flange type can back out prematurely or fail to develop the required clamp load, leading to loose components or accelerated wear at the joint.

For help confirming fitment or placing an order, contact the DHS Equipment parts team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.